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Thread: What spiral bit for a downdraft router table?

  1. #1
    Join Date
    Apr 2004
    Location
    Comfort, TX
    Posts
    373

    What spiral bit for a downdraft router table?

    I see up cutting, down cutting, and even have seen combos spiral bits. I will be using mine for cutting plywood using a temp[late on a downdraft router table. Does it make a difference if plywood or solid wood which to choose? I have read somewhere that one causes more tearout than the other but don't remember which does what. TIA
    Tim in the beautiful Hill Country of Texas

  2. #2
    Tim, you donít say what you are trying to do. The fastest cutting bit is a 1/2 ď diameter single flute .

  3. #3
    Depends which side the template is on. Want to draw toward template.

  4. #4
    Join Date
    Dec 2012
    Location
    Hampton, GA
    Posts
    100
    Tim, In my experience, up and down spiral bits do not differ amount of tear out, but in where the tear out is most likely to occur. Up spiral is most likely to cause tear out on the surface closest to the router. Down spiral is most likely to cause tear out on the surface farther most from the router.

  5. #5
    Join Date
    Feb 2009
    Location
    Cedar Park, TX - Boulder Creek, CA
    Posts
    546
    Grooves or pockets, down cut.
    Profiling, compression bit.

    Solid wood, deep pockets, up cut.

  6. #6
    Join Date
    Apr 2004
    Location
    Comfort, TX
    Posts
    373
    Sorry was out of pocket. My first project will be using a template to cut out large areas 16" x 4-1/2" in plywood like Ron Paulk does. I have seen vids of people using a handheld router to do this but seems much easier with a template on a router table. Since some of these sections will be as long as 7', I think it best to have the template on top. In the future will be doing dados in both ply and solid wood. Ashampoo_Snap_Saturday, June 12, 2021_19h10m43s_010_.jpg
    Tim in the beautiful Hill Country of Texas

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